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Journal of Automated Methods and Management in Chemistry
Volume 2007, Article ID 39761, 4 pages
Research Article

Comparison Study of Different BOD Tests in the Determination of BOD7 Evaluated in a Model Domestic Sewage

1Department of Chemistry, Faculty of Science, University of Oulu, P.O. Box 3000, Oulu 90014, Finland
2Water Resources and Environmental Engineering Laboratory, Department of Process and Environmental Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, Oulu 90014, Finland
3Oulu Waterworks, Kasarmintie 29, Box 35, Oulu 90015, Finland

Received 9 October 2006; Accepted 26 April 2007

Copyright © 2007 Katri Roppola et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of this research was to study the suitability of a manometric respirometric test (OECD 301F) for the determination of biological oxygen demand (BOD) in domestic wastewater. This was done by comparing four different BOD tests (a manometric respirometric test, oxygen sensor determination, iodometric titration, and UV absorption measurement) and by evaluating the BOD7 value after a short-term measurement applying the manometric respirometric test. Measurements were done in three dif-ferent laboratories. The respirometric test was performed well on municipal sewage, and the precision of results was good. There were minor deviations between BOD7 values as determined by the different methods, but the deviations were not essentially big enough to have a practical impact. Evaluation of the BOD7 value after two or three days' incubation by the respirometric method was shown to work well; average deviations between measured and evaluated values after three days' incubation were 5–18%. Hence, the manometric respirometric test proved to be a rapid and suitable tool for process control purposes.